A fan unit for a heat exchanger of a vehicle, has a plate-like support structure or shroud which has a main opening defining a passage for a flow of air for ventilation of the heat exchanger, and an electric fan arranged to cause the flow of air. The fan has a drive motor and an impeller connected to the motor. The support structure or shroud has a top side intended to extend at a small distance from a horizontal cross-member of the heat exchanger or the vehicle, so that an interspace is defined between them. This top side of the support structure or shroud has a flexible sealing gasket which has a configuration such that, in the assembled operating condition of the fan unit, the gasket is able to close off the interspace.
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1. A fan unit for a heat exchanger of a motor vehicle, comprising:
a rectangular support structure or shroud with a rim which has a main opening defining a passage for a flow of air for ventilation of the heat exchanger;
an electric fan mounted in the region of said main opening for inducing said flow of air and including an electric drive motor and an impeller connected to said motor; and
said rectangular support structure or shroud having a top side intended to extend at a small distance from a horizontal cross-member of the heat exchanger or the motor vehicle, wherein an interspace is defined between the rectangular support structure or shroud and the horizontal cross-member of the heat exchanger,
wherein said top side of the support structure or shroud is integrally connected with a flexible sealing gasket substantially perpendicular to said horizontal cross-member and having a configuration such that, in the assembled operating condition of the fan unit, said gasket seals only said top side of said interspace allowing air flow through all other sides of said interspace,
and wherein said flexible sealing gasket is compressed longitudinally against said horizontal cross-member wherein the horizontal cross-member of the heat exchanger includes an outer rim and an inner rim, the outer rim and the inner rim each extending towards the rectangular support structure or shroud, the rim of the rectangular support structure or shroud being disposed between the outer rim and the inner rim.
2. The fan unit of
a fixing profile intended to engage with a corresponding retaining formation provided the said top side of the support structure or shroud; and
a lip-type sealing profile.
3. The fan unit of
4. The fan unit of
5. The fan unit of
6. The fan unit of
7. The fan unit of
8. The fan unit of
9. The fan unit of
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This non-provisional patent application claims priority under 35 U.S.C. §119(a) from Patent Application No. TO2011U000141 filed in Italy on Dec. 19, 2011.
This invention relates to a fan unit for a heat exchanger and in particular, to a fan unit for a heat exchanger of a motor vehicle.
The present invention relates to a fan unit for a heat exchanger, in particular a radiator, of a motor vehicle.
More specifically the invention relates to a fan unit for a heat exchanger, of the type comprising: a plate-like support structure, or shroud, which has a main opening defining a passage for a flow of air for ventilating the heat exchanger; and an electric fan mounted on the support structure or shroud and arranged in the region of the main opening to induce the flow of air through the main opening. The fan includes an electric drive motor and an impeller connected to the motor. The plate-like support structure or shroud has a top side intended to extend at a small distance from a horizontal cross-member of the heat exchanger or the motor vehicle, so that an interspace is defined between them.
Part of the air flow produced by the electric fan escapes through the aforementioned interspace during operation and this adversely affects the overall efficiency of the fan unit.
Thus there is a desire for a fan unit which mitigates the above drawback of known fan units or at least provides a useful alternative.
Accordingly, in one aspect thereof, the present invention provides a fan unit for a heat exchanger of a motor vehicle, comprising: a plate-like support structure or shroud which has a main opening defining a passage for a flow of air for ventilation of the heat exchanger; and an electric fan mounted in the region of the main opening for inducing the flow of air and including an electric drive motor and an impeller connected to the motor; and the support structure or shroud having a top side intended to extend at a small distance from a horizontal cross-member of the heat exchanger or the motor vehicle, so that an interspace is defined between them, wherein the top side of the support structure or shroud is provided with a flexible sealing gasket having a configuration such that, in the assembled operating condition of the fan unit, the gasket is able to close off the interspace.
Preferably, the gasket comprises: a fixing profile intended to engage with a corresponding retaining formation provided along the top side of the support structure or shroud; and a lip-type sealing profile.
Preferably, the lip-type sealing profile is formed as one piece with the fixing profile.
Preferably, between the fixing profile and the sealing profile the gasket has at least one longitudinal groove suitable for defining a flexible intermediate zone.
Preferably, the flexible intermediate zone is in the form of a resilient hinge.
Preferably, the retaining formation has a cross-section substantially in the form of the digit “1” and the fixing profile of the gasket has a recessed seat with a cross-section matching that of the remote portion of the retaining formation.
Preferably, the retaining formation has transverse retaining projections which engage inside corresponding holes in a wall of the recessed seat of the fixing profile of the gasket.
Preferably, the impeller comprises a hub and a plurality of blades extending generally radially from the hub, the radially outer ends of the blades being connected to a peripheral ring.
A preferred embodiment of the invention will now be described, by way of example only, with reference to figures of the accompanying drawings. In the figures, identical structures, elements or parts that appear in more than one figure are generally labeled with a same reference numeral in all the figures in which they appear. Dimensions of components and features shown in the figures are generally chosen for convenience and clarity of presentation and are not necessarily shown to scale. The figures are listed below.
In
The fan unit 1 also comprises an electric fan, denoted overall by 6, which is arranged inside the main opening 3. The electric fan 6 includes an electric drive motor 7 and an impeller 8, with a plurality of blades 9, connected to the motor. The radially outer ends of the blades 9 are connected to a peripheral ring 10.
The support structure or shroud 2 has a horizontal top side 2a which, in the assembled condition of the fan unit 1, extends at a small distance from a horizontal cross-member 20 (
With reference in particular to
With reference again in particular to
The retaining formation 14 has a cross-section substantially in the form of the digit “1” and the fixing profile 13 has a recessed seat 13a with a cross-section substantially matching that of the retaining formation 14. The retaining formation 14 may have a plurality of transverse retaining projections 19 which engage inside corresponding holes 13b in a wall of the recessed seat 13a of the fixing profile 13.
The gasket 12 may be made, for example using an elastomeric material, in particular by means of an extrusion process. The gasket 12 may be fitted onto the retaining formation 14 with extreme ease and is fixed in a stable and reliable manner.
In the operating condition, shown in
Although the invention is described with reference to one or more preferred embodiments, it should be appreciated by those skilled in the art that various modifications are possible. Therefore, the scope of the invention is to be determined by reference to the claims that follow.
In the description and claims of the present application, each of the verbs “comprise”, “include”, “contain” and “have”, and variations thereof, are used in an inclusive sense, to specify the presence of the stated item but not to exclude the presence of additional items.
Murador, Francesco, Tenco, Valentino
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Oct 31 2012 | MURADOR, FRANCESCO | JOHNSON ELECTRIC S A | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 029504 | 0270 | |
Oct 31 2012 | TENCO, VALENTINO | JOHNSON ELECTRIC S A | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 029504 | 0270 | |
Dec 19 2012 | Johnson Electric S.A. | (assignment on the face of the patent) | ||||
Sep 25 2018 | JOHNSON ELECTRIC S A | JOHNSON ELECTRIC INTERNATIONAL AG | MERGER SEE DOCUMENT FOR DETAILS | 048747 | 0914 |
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